Closure



Aug. 21, 1928. 1,681,661 f J. H. DlLLONA ET AL cLosURE Filed June l, 1925 fifa..

Juli TTORNEYS anpw Patented Ang. 21, 1928.A

" i UNITED 'STATES PATENroFFicE.

.if'isnieny H. DILnoN AND HoWeRD H'. FAIRWEATHER, or 'coApTEsvrLLni rnivNs'Yt- VANIA, AssrGNoRsfro Bn'rHLEHEM STEEL ooMPAivv. f

1 joLosuRE.

Appiication median@ 1, `1925. seal Nantes?. i

dles and throughwhich bolt holes or the like extend for holding bolts. Theseperforations weaken thecover-platev and kleakage is liable to occur around' the bolts. lt is,usually V.necessary to employspecially shaped boltser special attaching means to clamp a manhole cover-plate to the side of a boiler.

e One of the objects of our inventionis to attach a handle to a covenplate of this character in sucha manner as to form a brace' forthe cover-plate, whereby, in its'manui'ae ture, thinnerplate material may be used and whereby such plate may be more easily carried or held in position when securing itvto the side of a boiler.

Another object of our invention is to form the handle with T-slots, so that al bolt of or# v improved manhole cover-plate;

Fig. 2 is a longitudinal `sectional view taken on line'II-II of Fig. 1; f 1

-Fig. 3 is a transverse sectional view take .on the line III-III of Fig. 1;

Fig.V 4 is a transverse sectional view taken fon the line IV-IV of Fig. 1; andl Fig. 5 is a longitudinal sectional elevation taken on the line V-V of Fig. 1 and show-V ing v,enough of theboiler casing and yokes to illustrate the application of our invention.

Referring to the drawings more in detail, l

.the numeral 10 (Fig. 5) indicates the shell or `casing of a boiler, having an oblong opening 11 surrounded by an integral flange 12. 13

fis the cover plate for closing the opening `11.

This cover-plate has a flanged edge 14, which bears against the flange 12 of the boiler casing 10; and mounted between the two flanges form shown clearly in thedrawings.

T-slot.

.12 and 14 is a suitable gasket 15... fllheqcoverL plate 13 ismade preferably of ay single sheet or steel plate struck upbetween dies tothe The cover-plate 13 has a dome portion 17 extending outwardly from the fla-n ge and the dome is .provided with ,a central oblong depressionl extending in the direction ofythe .minor axis of the cover. `Lateral depressions 18 are arranged at the sides of the depression 16 to receive the ends of the handle 19 which are `welded therein as indicated [at 20.

lThe edges 21 of the central portion of the handle 19 are bent outwardly in orderk to be more easily grasped.y Near each end gof the i handle is formed ka Tslot 22, beneath which l 25 are iirst inserted in the widest part of the T-slots 22 in an inclined position and then the bolts are turned upright and the heads are moved back into the sockets 23 with the shanks fitting the narrower portion of the These bolts 25 extend outwardly through yokes 26 owell `known form and are screw threaded at their outer ends, as at 27, for the reception of nuts 2 8. f

The metal between the ilaiige 111 and the depressed portion 16 of the manhole .coverplate is shaped to Jform a substantially anun.- lar hollow rib 17,k which is connected andres inforced centrally by means of the handle 19, tlis strengthening the cover-plate consider- Having sockets formed on the outside ,of the cover-plate for receiving the heads of the bolts enables us to use any kind of stock bolt, without having to use bolts .of special forni, and obviates the necessity of punching -holes in the cover-plates, thereby avoiding leakage and strengthening the cover-plate.

In. Jforming manhole cover-plates in this manner, weare able to use a thinner material,

are sockets23for1nedcby the lower portions f and, at thesame time, to make a structure;

susceptible of various other changes and Inod-V ifications without departing from the spirit thereof, and we desire, therefore, that only tween the central depressed portion a-ndi'tliea flanged edge, and recesses formed in the hollow ribat opposite sidcsfo-the'depressed port1on, and a handle extending across the depression and having itsenjds-seated inthe recesses and WeldedE tothe cover-plate, said handle beingydisposed in Y substantially the planev of therib.l

2;' A closure device comprising an inoper-r forate-coverplate, havlng/aflanged edge, a

depressed central portion, arib between the flanged edge andthe depressed? central p ortion, recesses formed inv they rib at oppositel sides/ofthe depressed portion, and a handle ei -te,'1iclir1gv across the depressionY and? having its ends-seated inthe recesses andWel'd'edt-o thefcoverfplate, saidhand'lehaving T`slots extending therethrough near each end, said plane .ofi the rib.`

handleY being` disposedy in,y substantiallyy thev 30 A 3f. In a deviceot thezclass-` described, the

` 'combination o`anlimperforate-cover-plate,

, its ends-seated. in thefrecessesiandiwyveldedit@ y `the cov,er,-plate5lf saidL handle having T-slots f extending therethrough near each end and in 'registry With the sockets formed in the hol- Lessiei having a anged edge, a depressed centraly portion, la hollow -rib between the Banged edge and the depressed central portion, and

recesses,y and sockets formed' in thefribmt opy posite sides o' the depression, 'and' a-vhandle ext-ending across the depression'and lhaving lon7 rib for the reception of clamping bolts, said handl'elbeingi `disposed in substantially7 the plane of the rib. Q f 1 4. A man-hole; closure comprising anyirnperorate cover?, havingy al flange-y providingj a boundaryseat, a deine 'por-tion:extending-out- `Wardlyffrom they seat' sideo'theilange, a; depressionextendngftransnerselyf oi( theL donne-ll` portion, opposeddepiessionsin the '-dbinepertion g andi extending lateral-1yr offtlielfi'rst) dpression, andI ahandledaying itsfendstfting in the lateral depressions ,andi Weld'edb'o the cover, saidi handle beingv provided' Witlivbol't' holding means, said handlefbeingdisposedlin substantially thel plane oftlie domev portion, In testimony whereof" IT hereuntoathe my y signature-thislthday offM'ay; 1925.'

s JOSEPH HIXEIILJOKk lInY testimony,l whereof Il'lereuntofaiiz* y signaturethisl 16th dxy= o-flfM'ay; '19253 f HOTNARE 

